1 radian = 360/tau (or 180/pi) degrees.
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An informal definition: If you take a radius of a circle and wrap it around its circumference then the angle which that arc will make at the centre of the circle is 1 radian.More formally, a radian is 1/(2*pi) of a whole angle.
180/pi, just over 57 degrees.
One radian is about 57.3 degrees
A full circle is either 360 degrees, or 2 x pi radians, so the exact conversion factor is: 1 radian = 180/pi degrees
One radian = 180/pi or about 57.3 degrees (pi = about 3.14).